RFR: Fix typo

[Magnus Ihse Bursie]

Fix typo. Also, add some text here to keep Skara happy.

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Commit messages:
 - Fix typo.

Changes: https://git.openjdk.java.net/guide/pull/73/files
 Webrev: https://webrevs.openjdk.java.net/?repo=guide&pr=73&range=00
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/guide/pull/73.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/73/head:pull/73

PR: https://git.openjdk.java.net/guide/pull/73